Chapter 2. Installation16 PACSystems* RXi Distributed IO Controller User Manual GFK-2816F2. Install the unit on the DIN Rail.a. Start with the unit rotated approximately 20º from the panel.b. Engage the latches at either the top or bottom of the black DIN rail clip (attached tothe adaptor) onto the DIN rail.c. Rotate the unit toward the DIN rail and engage both sets of latches with the rail.d. Press the unit into place.a.b.c.